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allow a virtual register to be associated with live-in values.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21927 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2005-05-13 07:08:07 +00:00
parent fe07581d78
commit 712ad0c36d
3 changed files with 22 additions and 15 deletions
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include/llvm/CodeGen/MachineFunction.h
+14 -7
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@@ -108,7 +108,10 @@ class MachineFunction : private Annotation {
/// LiveIns/LiveOuts - Keep track of the physical registers that are
/// livein/liveout of the function. Live in values are typically arguments in
/// registers, live out values are typically return values in registers.
std::vector<unsigned> LiveIns, LiveOuts;
/// LiveIn values are allowed to have virtual registers associated with them,
/// stored in the second element.
std::vector<std::pair<unsigned, unsigned> > LiveIns;
std::vector<unsigned> LiveOuts;
public:
MachineFunction(const Function *Fn, const TargetMachine &TM);
@@ -177,16 +180,20 @@ public:
/// addLiveIn/Out - Add the specified register as a live in/out. Note that it
/// is an error to add the same register to the same set more than once.
void addLiveIn(unsigned Reg) { LiveIns.push_back(Reg); }
void addLiveIn(unsigned Reg, unsigned vreg = 0) {
LiveIns.push_back(std::make_pair(Reg, vreg));
}
void addLiveOut(unsigned Reg) { LiveOuts.push_back(Reg); }
// Iteration support for live in/out sets. These sets are kept in sorted
// order by their register number.
typedef std::vector<unsigned>::const_iterator liveinout_iterator;
liveinout_iterator livein_begin() const { return LiveIns.begin(); }
liveinout_iterator livein_end() const { return LiveIns.end(); }
liveinout_iterator liveout_begin() const { return LiveOuts.begin(); }
liveinout_iterator liveout_end() const { return LiveOuts.end(); }
typedef std::vector<std::pair<unsigned,unsigned> >::const_iterator
livein_iterator;
typedef std::vector<unsigned>::const_iterator liveout_iterator;
livein_iterator livein_begin() const { return LiveIns.begin(); }
livein_iterator livein_end() const { return LiveIns.end(); }
liveout_iterator liveout_begin() const { return LiveOuts.begin(); }
liveout_iterator liveout_end() const { return LiveOuts.end(); }
/// getBlockNumbered - MachineBasicBlocks are automatically numbered when they
/// are inserted into the machine function. The block number for a machine